.5x12 (30+42)
v v
6 * 72= 432 ft
So basically you're dividing 12 by 3 times x which is 12 over 3x. 12/3x

-----------------------------------------------------
Answer:
D.) Fixed costs do not change no matter how much a business produces; variable costs do change.
Step-by-step explanation:
A variable cost varies with the amount produced, while a fixed cost remains the same no matter how much output a company produces.
I'm 100% sure that this is the answer.
Answer:
x= square root of 130
Step-by-step explanation:
a^2+b^2=c^2
a=7 b=9 c=x
49+81=x^2
130=x^2
square root of 130=x